<template>
  <el-menu text-color="#fff" active-text-color="#ffd04b" background-color="#545c64" default-active="1-4-1" class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse">
    <h3 class="title">{{ isCollapse ? '后台' : '通用后台管理系统' }}</h3>
    <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :key="item.path" :index="item.path + ''">
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu v-for="item1 in hasChildren" :key="item1.path" :index="item1.path + ''">
      <template slot="title">
        <i :class="'el-icon-' + item1.icon"></i>
        <span slot="title">{{ item1.label }}</span>
      </template>
      <el-menu-item-group v-for="(item2, subIndex) in item1.children" :key="item2.path">
        <el-menu-item @click="clickMenu(item2)" :index="subIndex + ''">{{ item2.label }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<script>
export default {
  data() {
    return {
      // menu: []
      // isCollapse: false,
      menu: [
        {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home'
        },
        {
          path: '/mall',
          name: 'mall',
          label: '商品管理',
          icon: 'video-play',
          url: 'Mall/Mall'
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
          url: 'User/User'
        },
        {
          label: '其他',
          icon: 'location',
          children: [
            {
              path: '/page1',
              name: 'page1',
              label: '页面1',
              icon: 'setting',
              url: 'Other/PageOne'
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
              url: 'Other/PageTwo'
            }
          ]
        }
      ]
    }
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath)
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath)
    },
    clickMenu(item) {
      this.$router.push({
        name: item.name
      })
      this.$store.commit('selectMenu', item)
    }
  },
  computed: {
    noChildren() {
      return this.menu.filter(item => !item.children)
    },
    hasChildren() {
      return this.menu.filter(item => item.children)
    },
    isCollapse() {
      return this.$store.state.tab.isCollapse
    }
    // asyncMenu(){
    //   return this.$store.state.tab.menu
    // }
  }
}
</script>

<style scoped lang="less">
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu {
  height: 100%;
  border: none;
  .title {
    height: 60px;
    background-color: #444;
    color: white;
    margin: 0;
    text-align: center;
    line-height: 60px;
  }
}
</style>
